Common separation of contaminating elements from electrolyte...

Details Common separation of contaminating elements from electrolyte... Common separation of contaminating elements from electrolyte...

C - Chemistry, Metallurgy

22

B

362/45

C22B 3/00 (2006.01) C22B 3/32 (2006.01) C22B 3/40 (2006.01)

Patent

CA 1331492

ABSTRACT OF THE DISCLOSURE A process for the common or simultaneous separation of arsenic, antimony, bismuth and iron from electrolyte solutions of valuable metals by solvent extraction and subsequent recovery of the contamination elements, which process is characterized in that aqueous mineral-acidic electrolyte solutions of valuable metals are admixed with a sparingly water soluble organic solvent con- taining at least one hydroxamic acid, the aqueous and organic phases are thoroughly mixed, the contaminating elements arsenic, antimony and bismuth are precipitated from the organic phase by direct sulfide precipitation, the sulfides are separated, and the extracted iron is subsequently reextracted with a water soluble iron-complexing agent into an aqueous phase and recovered.

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